I have a RSA signature S (128 byte integer ) and modulus n (also 128 byte integer)
I need to calculate ( S**3 ) MOD n All I need is to perform exponent ( S**3 ) and MOD operation on 128 byte integers. I tried the following command: openssl rsautl -in signature.bin -out decrsign.bin -inkey RSAPubkey.pem -pubin -decrypt but got an error A private key is need for this operation Any idea how to decrypt this key ? Andrus. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]